{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xec7ca6e5f7972aa1b3bbf3677ea1d826ff55e26e06bc67233d853947caa7edf8",
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    "signer": "0x0AB9D08AaaB5a390760Dc12953A18909cb1DC93e",
    "userId": "664855023"
  }
}